Chester



(No Model.)

J. SHEPHERD. MACHINE FOR MAKING MOLDS AND GORBS T0 lBE USED IN CASTINGMETAL PIPS, &c.

Patented D D D.. i D.

NITED TATES `Jon SHEPHERD, or LowER nannsunti` vNEAR s'rocKPoR'nvvAssIeNoR -To HIMSELRAND THOMAS BOWES LEIGH,

CHESTER, ENGLAND.

0F HEAToNMERsEY, NEAR MAN:

MACHINE 'ron 'MAKme Moms'AND 'contato Bt u sto iN ,CASTING METAL PlPts,cc.

v 'SPECIFICATION forming part Aof Letters Patent No, 530,857, datedDecember 11, 1894. y

' Application tied Mara 1,1894. stanno. 501,975. (remodel.) Patented inEngland December 12. 1892, No. 22,785; n1

` Germany January 6, 1894, No. 77,640, and'in Belgium May 18,1894, No.110,026`

To all whom 'it may concern,.- Beit known that I, JOB SHEPHERD, a sub-Ject of the Queen o Great Britain andLIreland, residing at LowerBredbury, near Stoek-v port,`in the county of Chester, England, have vinvented Improvements inlvlachinesfor Making Molds and Cores to beUsedin Casting` Metal Pipes and Other Articles, (for which patents vhavebeen granted in foreigncountries as'follows: Great Britain, dated.Decem-` ber 12,1892, N o. 22,7 85.; Germany, dated Jann ary6, 1894, No.77,640, and B elgium,'dated May 18, 1894, No. 1l0,026,) of whichthe'following is a specification.

This invention hasreference to an improved machine for making molds andcores to be used in casting metal pipes and other articles, and it hasfor its objectv to enable molds and cores of good quality to be producedin a rapid and economical manner.

The machine comprises a rammen to which a reciprocating motion isimparted by the pistonand rod of a Huid pressure motor, a hopper forcontaining the material of which the mold or core is to be' made, andavalve that 'is arranged to control the passage of material from thehopper to a mold or core box below and is operated by or from theplunger the-arrangementbeing such that molding material will be admittedto the mold or core box each time the rammer rises and such materialwill be pressed to the required form by the rammer when the samedescends.

In some cases several rammers may be' used with one motor common tothem.

In the accompanyingdrawings, Figure 1 shows, partly in elevation andpartly in vertical section, a mold makingmachine according to thisinvention. Fig.' 2 is a diagrammatic View to a smaller scaleillustrating a modification. i

Referring to Fig. 1, A is an annular hopper provided with dividing ribsA and with an annular opening B controlled by a tubular valve C. Thisvalve is provided with a lip or projection C by which itis raised, andconsequently opened, by the angeD when the rod E to which it isconnected moves upward. Into the said hopper there is fed the material,

inderF to-Which'actuating Huid, such as steam '5 5 or air is admitted asrequired togoperate the piston and rodpE. To the rodE is secured anannular r'ammer Gat the upper end of which the flange D may be'arrangedas shown.,-

g H is a mold box with wide mouth H and Ko is a pattern, these beingsupported on the base p L carried by the trolley M mounted to run on-'ra ils at the bottom of va pit or underground chamber A* at the top ofwhich the hopperA is supported. As the-ramoner G rises, -the- 6.5 'Y

flange D comes in contact with the lip or pro-f jection C of the valve Cand raises thatvalve so as to'open 4the outlet B, through which earth,loam, or sand falls into the annular space Naround the pattern 'K inthebox H. 7o As the rammer G descends the'valve C will close and the remmerwill compress thema;

terial thathas fallen into the annular space.

-..N. On the completion of the mold the pattern K` is withdrawn; v

If desired means may be provided to prevent rotation of the rammer.

` When making'cores, there will besnbstitu'ted for pattern Ka box orcore barrel of suitable p form, and for the box H there willloesub'sti-` 8o tuted a suitable corebox which may be made in parts soas to openas well understood; an appropriate form of rammer being alsoused when necessary in lieu of that shown.,v The rammer might be workedby hydraulicpower but that would be less advantageous because theremmer-could not be so quickly actuated. By this invention theproductionof molds and cores is facilitated, their cost is reduced,

and lbetter molds or cores' may be obtained 9o When making molds orcores for smallpipes, the machine may be 'constructed with severalrammers such as GrA eachA working through a separate hopper and valve,and all carried by the same piston rod, means being provided to prevent'the piston'rod rotating about its center. Fig` 2 shows the upper part Yof an arrangement of` this kind Vsuitablefor making three molds or,cores simultaneously.

Inthis case the three rammers are carried by Vro yzo

rods E connectedto a common support E2' fixed to the lower forked end ofthe piston rod E, the three hoppers A serving to prevent rotation ofpiston rodand rammers. What I claimv is 1. A'mold or core making machinecomprising a hollow rammer, means for vertically re ciprocating said rammer, ,a hollow stationary feeding hopper provided at its lower end with,anoutlet, a tubular valve arranged' to slide vertically within saidhopper and to control said outlet, and means operated by said rammer forautomatically raising said valve during the ascent of said rammel',substantially as herein described for the purpose specified.

2.' A moldor core making machine, comprising a xed vertically actingreciprocating motor, a verticallyy reciprocating rammer ar- -rangedbelow and directly and rigidly con- *nected -to the reciprocatingipartof said motor and having its lower end corresponding in cross sectionalform to that of the mold or core tobe produceda hollow stationary feed-`ing hopper provided with a lateral outlet, a

tubular valve arrauged to slide vertically within said hopper andcontrol said outlet, and means operated by said rammer for automaticallyraising said valve during the ascent of the rammer, substantially asherein described for the purpose sr. ecilied.

v 3. A mold or core making machine comprising a fixed vertical liuidpressure reciprocating motor, a rammer'rigidly connected to and actuateddirectly bythe piston of said motor,

a 4mold or core box having a central patternv or core barrel arrangedbelow said4 motor, a stationary feeding hopper xed independently of andabove said mold or core box and provided with a feed outlet anda tubularand normally stationary valve arranged to slide vertically in saidhopper to control said feed outlet, and to be automatically raised andopened by said rainmer at each upstroke thereof, substantially asherein' described for `the purpose specified.

4. A mold or core making machine, comprising a uid pressurereciprocating motor,. a vertically movable rammer connected to thepiston of said motor, a hopper having at its lower end an outletsurrounding said rammer, a vtubular valve arranged within said hopper soas to `control the outlet therefrom and provided with a lip orprojection and a V'projecting' part carried by said rammer and arrangedto-act against said lipor projection on each upward movement of saidrammel' substantially as herein describedfor ,thepur-i pose specified.

5. A mold or core making machine, compris# ving a plurality ofvertically reciprocating rammers each corresponding in cross sectional4form-to that of the mold or core to be made,

a plurality of stationary feeding lloppers each j provided with anoutlet 'and arranged -to surround' one of said rammers above rthecorrespondingmold or core box, a plurality of tubular valves eachnormally stationary and adapted to controlthe outlet of one of saidhoppers and arranged to be automatically raised and opened by thecorresponding-ram-- vmer when the same moves upward, across head commonto said rammers and to which4 they are fixed, and a fixed verticalreciproi eating motor having its reciprocating part rigidly connected tosaid cross head, all substantially as herein described for the purposespeciiied.

6. The combination with a vertical mold or core box having therein afixed pattern or core barrel, of a vertically reciprocating annularrammer carrying aprojecting part a fixed vertically reciprocating motorarranged above and having its reciprocating part rigidly connected tosaid rammer, a stationary feeding hopper fixed above and independentlyof said bo'x and having a-lateral 4feed outlet, and a tubular valvearranged to slide vertically within said hopper'and control its feedoutlet, and provided vwith a lip or.,pr'o

jection arranged in the path of the projecting portion carried by saidrammer substantially as herein described.

7. A mold or core making machine, comprising the hopper A formed withlower outlet B and arranged at the top of a molding pit y or chamber Ai,the tubular valve C with lip or projection C', the vertical rammer Gwithv fiangerD, the fluid pressure` motor F having Aits piston rod Eextending through said hopper and connected to said rammer, and the moldor core box H supported below said hop- IIO

